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arXiv · 1811.07696

Centrality and energy dependence of charged particles in p+A and A+A collisions from running coupling $k_{T}$-factorization

Adrian Dumitru·Andre V. Giannini·Matthew Luzum·Yasushi Nara
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Abstract

We extend the numerical analysis of the energy and centrality dependence of particle multiplicities at midrapidity in high-energy p+A and A+A collisions from a running coupling $k_T$-factorization formula made in~\cite{Dumitru:2018gjm} by considering two unintegrated gluon distributions that were left out. While a good agreement with the experimental data in A+A collisions is achieved, improving the description of those observables in p+A collisions calls for a better understanding of the proton unintegrated gluon distribution at larger values of $x$ and also the use of a realistic impact parameter dependence.

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Adrian Dumitru, Andre V. Giannini, Matthew Luzum, Yasushi Nara. 2018-11-19. Centrality and energy dependence of charged particles in p+A and A+A collisions from running coupling $k_{T}$-factorization. https://arxiv.org/abs/1811.07696

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